Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca5c9c766d3e97b…

MALICIOUS

PDF

93.7 KB Created: 2021-03-18 15:15:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1ed8338437d85d19218b78eee8693e06 SHA-1: 3b57f04418fa7f66d9153d3f557d32ca338f25c1 SHA-256: fca5c9c766d3e97bfc858c40a0eb0d1fb275775ab0722e3d8a3064b28613df1d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/wix?keyword=better+homes+and+gardens+oil+diffuser+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402737/normal_5feb33c93a83b.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/how_to_remove_battery_from_motorola_flip_phone.pdfIn PDF document text
    • http://carishr.com/545098603430vbml.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/btc_result_2020_first_semester.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408330/normal_5ff6bda4b099d.pdfIn PDF document text
    • http://fosavaxenu.mypressonline.com/48127520430.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464525/normal_5fec9a4b5fde8.pdfIn PDF document text
    • http://pasendapp.online/bible_commentary_matthew_8_23-27vqhvc.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/melenenuwi.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/dijibudiwogegagexos92hb6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_dc19c9be755c43b49ec202f3b4a34a12.pdf?index=trueIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_318b6d2d3d5b42149f6b7caa42ec6aff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebaxa/fatukakabukofepalemumolel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/087d7655-07fa-4c80-8e33-ff910d0d50d8/tiwunokubituduf.pdfIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_0d76f16cc37b4daea4df7fec13a4f9b5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9484a4-b0f0-46fa-ad46-55a5e5537911/monitebidodufebumolilinov.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/aver_document_camera_software.pdfIn PDF document text
    • http://vuxebezedigelun.onlinewebshop.net/fenezu.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_8d4742c918e1470cb7c3a0e187d3fcc0.pdf?index=trueIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_d0bec0bc494d4dc9821227da7015564e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farokof/munkres_topology_solutions_chapter_3_section_26.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/blockchain_book_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13017 5368 bytes
SHA-256: b32b35ff165560c4ffbb997f6387c8e9d4ca5b87ebae5ff9c0b1493a379d88ec
font_01_sfnt_off0001422f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422F 11908 bytes
SHA-256: 67078d87f6a964e37ceffdaa2aa6b3355917bdbfbe7e8e403cae04e7a64ca7b7

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